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Method and device for identifying cut fractures

A technology of equipment and cutting gap, applied in welding equipment, laser welding equipment, metal processing equipment, etc., can solve the problems of low high-energy beam power, high feed speed, low oxygen pressure, etc.

Active Publication Date: 2016-06-15
TRUMPF WERKZEUGMASCHINEN GMBH & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The reason for this is often the feed rate is too high, the power of the high-energy beam is too low, the oxygen pressure is too low or the high-energy beam used is defocused too strongly

Method used

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  • Method and device for identifying cut fractures
  • Method and device for identifying cut fractures
  • Method and device for identifying cut fractures

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Embodiment Construction

[0036] figure 1 shows an exemplary structure of a device 1 for process monitoring and process regulation via CO 2 The laser cutting process carried out by the laser processing equipment on the workpiece 2, in figure 1 Only shown in CO 2 A processing unit 3 (part of a laser processing head) of a laser processing device having a CO made of zinc selenide for making the laser processing device 2 A focusing lens 4 for focusing the laser beam 5 , a cutting gas nozzle 6 and a deflection mirror 7 . In the case of the present invention, the deflection mirror 7 is constructed partially light-transmissive and forms an entry-side component of the device 1 for process monitoring.

[0037] The deflection mirror 7 reflects the incoming CO 2 The laser beam 5 (with a wavelength of about 10 micrometers) and transmitted, which is important for process monitoring, is reflected by the workpiece 2 and emitted by the CO 2 The region of interaction 22 of the laser beam 5 with the workpiece 2 emi...

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PUM

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Abstract

The present invention relates to methods and devices for identifying cut fractures. The invention relates to a method for detecting cutting breaks when cutting a workpiece with a high-energy beam, in particular with a laser beam, comprising: taking an image of a region (21) of the workpiece to be monitored, said region to be monitored comprising a high-energy beam The interaction zone (22) of the beam with the workpiece; evaluation of the captured image (B) for detection of slag droplets (25) on the end of said interaction zone (22) opposite the cutting front (23) ); and identifying said cutting fractures from the presence of said slag droplets (25). The invention also relates to a corresponding device for detecting cutting breaks.

Description

technical field [0001] The invention relates to a method for detecting cutting fractures (Schnittabriss) when cutting with a high-energy beam, in particular with a laser beam, comprising: recording an image of a region of a workpiece to be monitored, said region to be monitored comprising high-energy The area of ​​interaction of the beam with the workpiece. The invention also relates to a corresponding device for detecting cutting breaks. Background technique [0002] When thermally cutting a workpiece with a high-energy beam, for example with a plasma beam or with a laser beam, cutting fractures can occur, ie the high-energy beam no longer completely cuts through the (metallic) workpiece because the path energy is insufficient to melt the entire cut gap volume. Reasons for this are often the feed rate is too high, the power of the high-energy beam is too low, the oxygen pressure is too low or the high-energy beam used is defocused too strongly. When a cutting break occur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K26/03B23Q17/09G01N21/88
CPCB23K26/032B23K10/00B23K10/006B23K26/38B23K26/702B23K31/12B23K31/125
Inventor T·黑塞D·辛德黑尔姆B·雷加德
Owner TRUMPF WERKZEUGMASCHINEN GMBH & CO KG